Not only high levels of prolactin can cause gyno, but also high levels of estrogen. It appears that you did not use any compounds causing increases in prolactin levels. Therefore, I doubt it has to do with prolactin. Most probably, you have it due to excessive estrogen levels. Usually, the best way of finding out the reasons for different effects is doing a blood work, which will show with empirical precision what is happening in your body. However, I am pretty sure it is the estrogen, as prolactin is not affected by dbol and test. Besides, you were using HCG, which can also increase estrogen levels, and one of its side effects is precisely gyno. Therefore, I would try to treat the gyno as if it were estrogen related. For this you will need to do the following anti-gyno protocol, and it should get you off gyno:
Week Letrozole Nolvadex Cardarine N2Guard
1 1.25mgs/ED 40mgs/ED 20mgs/ED 5caps/ED
2 2.5mgs/ED 60mgs/ED 20mgs/ED 5caps/ED
3 2.5mgs/ED 60mgs/ED 20mgs/ED 5caps/ED
4 2.5mgs/ED 60mgs/ED 20mgs/ED 5caps/ED
5 1.25mgs/ED 40mgs/ED 20mgs/ED 5caps/ED
6 0.5mgs/ED 20mgs/ED 20mgs/ED 5caps/ED
TAPER: This phase is required to wean you off the aromatase inhibitors and prevent an estrogen rebound. If you don’t prevent an estrogen rebound, there is a good chance the gyno can come back.
7 0.25mgs/ED 10mgs/ED 20mgs/ED 5caps/ED
8 0.25mgs/ED 10mgs/ED 20mgs/ED 5caps/ED
9 -NONE- 10mgs/ED 20mgs/ED 5caps/ED
10 -NONE- 5mgs/ED 20mgs/ED 5caps/ED
Make sure to run it to the letter and completely finish the cycle. Many guys commit the mistake of stopping it the moment they feel improvements, which is a wrong thing to do.